Concrete-mixer.



H. U. PRINDLE.

GONORETE MIXER. APPLICATION FILED JULY 13,1911

1,079,952, 7 Patented Dec.2, 1913. V

3 SHEETS-SHEET 1.

WITNESSES: 1 INVENTOR j fl 2 fenr y Ylrv'n/aita I QZL OOLUMIIA PLANOORAP" C0. WASHINGTON. D. C

H. U. PRINDLE. CONCRETE MIXER. APPLICATIONIILED JULY 18,1911.

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COLUMBIIA PLANOGRAPH C0" WASHINGTON. D. C.

H. U. PRINDLE.

CONCRETE MIXER. APPLIOATION FILED JULY 18,1911.

Patnted Dec. 2, 1913.

3 SHEETS-SHEET 3 WITNESSES: INVENTOR UNTTEED STATES PATENT OFFICE.

HENRY URSON PRINDLE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO PLANETARY MACHINERY COMPANY, INCORPORATED, OF SAN FRANCISCO, CALIFORNIA.

CONCRETE-MEIER.

To aZZ whom it may concern:

Be it known that I, HENRY U. PRINDLE, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Concrete-Mixers, of which the following is a specification.

My present invention relates to means for mixing concrete and the like, and more particularly to that type of machines in which the paddles or stirrer members have a planetary movement within the mixing tank and in which said movement is imparted under a great speed and power.

My present invention primarily has for its object to provide an improved construction of the mixing tank, and the stirring and mixing mechanism that is cooperatively combined therewith, together with an improved means for tiltably supporting the mixer mechanism and the tank, and in its more subordinate features my present invention consists in certain details of construction, and peculiar combination of parts, all of which will hereinafter be fully. explained, specifically pointed out in the appended claims and illustrated in the accompanying drawings, in which Figure 1, is a perspective view of my present invention in its complete and opera tive form, the mixing tank and the mechanism that cooperates therewith being shown at the tilted position, the gate for the outlet being shown open for discharging the mixed cement. Fig. 2, is a vertical longitudinal section of the same taken on the line 22 on Fig. 8. Fig. 8, is a cross section thereof on the line 3-3 on Fig. 2. Fig. 4, is a detail view of the yieldable hinge connection for one of the stirrer paddles, the latter being at a normal position. Fig. 5, is a similar view, the paddle being shown as swung back by reason of engaging a hard substance lodged between it and the side of the tank.

In carrying out my present invention, I have provided a pair of standards 0-0 of triangular shape made of angle iron, and with the lower ends formed with foot portions 00 for bolting the base beams ZZ, which, when my present machine is in actual use, are transversely mounted upon a carriage 2 that consists of a pair of I-beams mounted on the carrier wheels 3-3, it being clear from Fig. l, of the drawings, that the Specification of Letters Patent.

Application filed July 18, 1911.

Patented Dec. 2, 1913. Serial No. 639,214.

entire mechanism, including the motor engine 30 is supported by the carriage so the same may be run adjacent to and for discharging into the receiving hopper 4 that conveys the mixed product to the point or points desired.

LL designate members that are hereinafter termed the trunnion brackets, and they include horizontally disposed foot portions ZZ that join with a mixing tank Z, the upper edge of which carries an angle iron rim .2 to which the pendent portions ZZ are riveted, as is clearly shown in the drawings. The pendent portions of the opposite brackets L have studs or trunnions Z Z that rock in bearings 00 in the upper ends of the standards 0. Trunnion Z is in the nature of a tubular bearing and it receives the shaft S, that is keyed (see Fig. 2) to the trunnion W to turn therewith. Shaft S has a chain sprocket F and a drive sprocket F loosely mounted on the outer end thereof, as is best shown in Fig. 1, which also shows the complete, or practical arrangement of my present mixing mechanism in its complete form, the drive sprocket F being shown coupled with the motor mechanism by the endless chain f, and the sprocket F as connected by a chain f to an upper sprocket E, that is keyed on the driven shaft e that imparts the-motion to the mixing mechanism in the manner presently explained. The trunnion bracket L, at one side, has a vertical standard 1% provided with a horizontal bearing m at the upper end, in which is journaled the outer end of the driven shaft 6, theinner end of which is mounted in a bracket bearing 7' on the top plate of an internalhead gear J that is bolted to and supported by the trunnion brackets LL, as is clearly shown in Fig. 2, which also shows the said gear formed with a central pendent hub j having a babbitt sleeve, or lining 7' D designates the paddle or stirrer mechanism driving shaft, that is journaled in the hub 7' the upper end of which is keyed to a beveled driving gear A that gears with and receives motion from a bevel pinion 15 on the driven shaft 6.

d designates a transmitting gear keyed onto the lower end of the shaft D and located within a horizontal casing N formed by the top and bottom yoke plates nn that are keyed to the shaft D to rotate there- 7 clearly shown.

with and for steadying the said casing N, bearing rollers YY are mounted on brackets x a" on top of the casing for engaging the rim rail j of the head gear J, as shown. The yoke plates na of the casing N have vertical bearing hubs for supplemental shafts KK, the upper .end of one of which carries the walking or planetary gear C that meshes with the internal rim of the head gear J, and each of the said shafts carries a supplemental gear 7;: held within the casing N that mesh with the central gear (Z, it being obvious that as the easing N is rotated through the motion imparted from the main shaft 6, the shafts K are revolved as they move in the planetary path with respect to the tank Z, in which the stirrer blades work.

Any approved type of stirrer blades may be attached to the lower ends of the shafts KK, but I prefer to use the forms of paddles or stirrers shown, and which, briefly stated, each consists of a head block 20 integral or keyed with the lower end of shafts KK and having axial lugs 2121, with which pivotally connect the wing portions of the mixer head. Each of the wing portions, near the lower edge, has an aperture 52 for the lugs 60 on end blocks 6, each of which carries a stirrer paddle 7 the parts being so arranged that the paddles are pivotally suspended to swing radially with respect to the tank, so that should the lower ends of the said paddle engage a hard substance next to the wall of the vat or tank, the said paddle will swing inwardly, as shown in Fig. 5. For relieving and holding the paddle to the normal pendent position, a coil spring 9 is used whose ends are connected to the paddle and. to the mixer head, as is I desire it understood that no special claim is made for the adjustable paddles since they form the subject matter of a copending application filed Jan. 21, 1911, Serial No. 603,895.

By reason of the peculiar construction and arrangement of the parts so far as has been shown and described, it will be readily apparent that the operation of mixing eontinues, no matter whether the mixing means within the tank are tilted or are at the vertical position.

It will be observed, by reference to Fig. 3, the mixing tank Z has a hopper, or infeed portion a at one side, and a discharge opening a? and chute 2 at the opposite side. Again, by referring to Fig. 1, it will be noticed the opening a ,is cont-rolled by a gate G. that is vertically slidable in the opposite angle iron guides gg which are fastened to the tank Z.

HI-I designate a pair of oppositely disposed lever arms that are pivotally hung at their lower ends on brackets M -M mounted on the carriage and whose upper ends are hinged to the oppositely projected pintles i-i on a cross piece I bolted to the upper end of the gate G, the connection of the lever arms with the gate G and the carriage being such that as the tank is tilted to a discharging position, as in Fig. 1, the gate G will be automaticallyshoved. up to open the discharge, the size of the opening depending on the degree to which the tank is tilted.

T designates the tilting lever fulcrumed at t on the inner standard O and whose lower end joins with a link If pivotally connected to the bottom of the tank, see Fig. 2.

From the foregoing description, taken in connection with the accompanying drawings the complete construction, and the advantages and the manner of operating the mixing tank and the dumping of the material, while running the mixer, will be readily apparent to those skilled in the art to which my invention relates.

While I have shown the invention as prmarily adapted for use as a mixing device, I do not desire that the same be limited to this use, as with or without slight modification, the device can be employed as a rolling mechanism, grinding mechanism, or cutting mechanism, and I desire it understood that the invention may be employed whereever it may be found desirable.

What I claim is 1. A carriage having bearings, a machine having trunnions mounted in said bearings, said machine having an outlet opening, a gate for controlling said opening, and selfactuated means for automatically opening and closing said gate as said machine is tilted on its trunnions.

2. A carriage having bearings, a mixing machine including a working element and having trunnions mounted in the said bearings, means continuously operating said working element of the said mixing machine, and other means engaging said machine for tilt-ing said machine on its trunnions without stopping the operation of the same, the said machine including a tank having an outlet opening, and a gate for the said opening, and means for opening and closing the said gate as the tank is tilted on its trunnions.

3. A carriage having bearings, a mixing machine including a working element and having trunnions mounted in the said bearings, means continuously operating said working element of the said mixing machine, and other means engaging said machine for tilting said machine on its trunnions without stopping the operation of the same, the said machine including a tank having an outlet opening, a gate for the said opening, means connected with the carriage'and with the said gate for opening and closing the gate as the tank is tilted in opposite directions.

4. A carriage having bearings, a mixing machine having trunnions mounted in the said bearings, means for continuously operating said working element of the said mixing machine, said machine including a tank connected to and tilt-able with the mixing machine, said tank having an infeed at one side and a discharging outlet at the other side, a gate slidable over the said outlet, arms hinged at one end to the carriage, and at the other end pivot-ally connected to the sliding gate and adapted when the tank is tilted to open and close the gate, and lever mechanism for tilting the tank.

5. A support having bearings, a machine having trunnions mounted in said bearings, said machine including working elements, and a tank in which said elements are .located, a power applying device exterior to the machine, and cooperative connections between said power applying device and said working elements, said tank having an opening, a gate for said opening, and selfactuated means cooperatively connecting said gate with said support for opening and closing the gate as the machine is tilted on its trunnions.

6. A support having bearings, a machine including a tank and having trunnions mounted in said bearings, said machine including operating devices projected within said tank, a power applying device mounted on said support, and continuous operative connections between said power applying device and said operating device for imparting motion to said operating devices, said tank having an opening, a gate for controlling said opening, means cooperative with said gate for opening and closing the same as said tank is tilted on its trunnions, and means cooperative with the tank for effecting the tilting act.

HENRY URSON PRINDLE. Witnesses:

A. J. MORSMAYER, F. A. DEVLIN.

Copies of this patent may be obtained for five cents each, by addressing the aommissioner of Patents, Washington, D. G. 

